overflow:hidden doesnt work in Firefox?

    /* main content */
#site_content
{ width: 100%;
  overflow: hidden;
  margin: 5px 0px 0px 0px;
  background: #FFF;
} 

The overflow in function works in all browsers apart from firefox? is there a work around or something i am missin开发者_运维问答g?

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it's #main which should have the overflow:hidden, it's that div which needs to contain the floated logo and site content

alternatively clear:both on #site_content might also do it.. I didn't look to see what where or why, but #main should be the "main" container

PS: also don't know if it's a typo but you have a stray br right after the opening head tag which is closing it, and making all your styles and scripts go inside the body element